I have a new Metro Premium 6/1, am looking to do some trading with it for a larger listeroid, new or used. I'd prefer a larger single, but would entertain a twin too, It's located in Iowa.I currently am running a Field Marshall 6/1 (back iin service today after a year off!!) and I really like it, but just not big enough to fully power my home. Also will be looking for a larger ST head, say 7.5 to 15 KW, thanks, Mike